fixes the error. I don't think I am misinterpreting.
You misinterpreted it. believe me, I have written this library. So undo the change with the object as this might surpress an error and cause the library to fail without error.
The reason for the error message is a typo in line 280, you kissed a "-":
$diffstr = $this>quote(serialize($diffrec_full));
$diffstr = $this->quote(serialize($diffrec_full));